VICKERS電(dian)磁閥(fa)(fa)(fa)(fa)(fa)和(he)安(an)全閥(fa)(fa)(fa)(fa)(fa)為一體，組成(cheng)先導式(shi)壓(ya)力(li)閥(fa)(fa)(fa)(fa)(fa)，該閥(fa)(fa)(fa)(fa)(fa)即(ji)是卸(xie)(xie)(xie)荷(he)(he)閥(fa)(fa)(fa)(fa)(fa)又(you)是安(an)全閥(fa)(fa)(fa)(fa)(fa)，有時又(you)是溢流閥(fa)(fa)(fa)(fa)(fa)．卸(xie)(xie)(xie)荷(he)(he)時其(qi)控制(zhi)油(you)(you)(you)道(dao)貫穿(chuan)各路(lu)換(huan)向(xiang)閥(fa)(fa)(fa)(fa)(fa)，同前述卸(xie)(xie)(xie)荷(he)(he)油(you)(you)(you)道(dao)．當各路(lu)換(huan)向(xiang)閥(fa)(fa)(fa)(fa)(fa)處于中立位(wei)置時，卸(xie)(xie)(xie)荷(he)(he)閥(fa)(fa)(fa)(fa)(fa)的控制(zhi)油(you)(you)(you)道(dao)貫穿(chuan)各路(lu)換(huan)向(xiang)閥(fa)(fa)(fa)(fa)(fa)并與油(you)(you)(you)箱連通．卸(xie)(xie)(xie)荷(he)(he)時，大(da)部分油(you)(you)(you)液卸(xie)(xie)(xie)荷(he)(he)，通道(dao)短，壓(ya)力(li)損失低．任一路(lu)閥(fa)(fa)(fa)(fa)(fa)換(huan)向(xiang)工(gong)作，便切斷控制(zhi)油(you)(you)(you)道(dao)，油(you)(you)(you)源來(lai)油(you)(you)(you)就從(cong)換(huan)向(xiang)閥(fa)(fa)(fa)(fa)(fa)進入執行元(yuan)件(jian)工(gong)作，其(qi)工(gong)作壓(ya)力(li)大(da)小由導閥(fa)(fa)(fa)(fa)(fa)控制(zhi)．此(ci)時系統壓(ya)力(li)為導閥(fa)(fa)(fa)(fa)(fa)調整壓(ya)力(li)．該種(zhong)卸(xie)(xie)(xie)荷(he)(he)方(fang)式(shi)，即(ji)使換(huan)向(xiang)閥(fa)(fa)(fa)(fa)(fa)路(lu)數增(zeng)(zeng)加，只是控制(zhi)油(you)(you)(you)道(dao)增(zeng)(zeng)加，卸(xie)(xie)(xie)荷(he)(he)壓(ya)力(li)增(zeng)(zeng)加不大(da)，始(shi)終保持較(jiao)低卸(xie)(xie)(xie)荷(he)(he)壓(ya)力(li)，此(ci)種(zhong)卸(xie)(xie)(xie)荷(he)(he)方(fang)式(shi)多用于手(shou)動(dong)換(huan)向(xiang)閥(fa)(fa)(fa)(fa)(fa)，卸(xie)(xie)(xie)荷(he)(he)可靠．

VICKERS電磁(ci)閥(fa)(又是安全(quan)閥(fa))的主閥(fa)按配合形式(shi)(shi)(shi)(shi)不同(tong)(tong)(tong)可分為(wei)三級(ji)(ji)(ji)同(tong)(tong)(tong)心(xin)、二(er)級(ji)(ji)(ji)同(tong)(tong)(tong)心(xin)和滑閥(fa)式(shi)(shi)(shi)(shi)三類．其中滑閥(fa)式(shi)(shi)(shi)(shi)結構(gou)工作壓(ya)(ya)力低，控制壓(ya)(ya)力精度不高；三級(ji)(ji)(ji)同(tong)(tong)(tong)心(xin)結構(gou)雖成熟，目(mu)前應用較(jiao)廣(guang)(guang)，但(dan)與(yu)二(er)級(ji)(ji)(ji)同(tong)(tong)(tong)心(xin)式(shi)(shi)(shi)(shi)比較(jiao)，不及二(er)級(ji)(ji)(ji)同(tong)(tong)(tong)心(xin)式(shi)(shi)(shi)(shi)動作靈敏(min)，規格相同(tong)(tong)(tong)，行(xing)程相同(tong)(tong)(tong)時，二(er)級(ji)(ji)(ji)同(tong)(tong)(tong)心(xin)結構(gou)的通(tong)油能力遠大于三級(ji)(ji)(ji)同(tong)(tong)(tong)心(xin)結構(gou)；二(er)級(ji)(ji)(ji)同(tong)(tong)(tong)心(xin)式(shi)(shi)(shi)(shi)控制壓(ya)(ya)力穩定(ding)，加工工藝性好，二(er)級(ji)(ji)(ji)同(tong)(tong)(tong)心(xin)式(shi)(shi)(shi)(shi)應用前景廣(guang)(guang)闊，這(zhe)里以(yi)二(er)級(ji)(ji)(ji)同(tong)(tong)(tong)心(xin)結構(gou)，討論(lun)其結構(gou)尺寸設(she)計(ji)方法．擾

VICKERS電磁閥(fa)(fa)出來(lai)的(de)(de)先(xian)導油(you)控制主(zhu)換向閥(fa)(fa)閥(fa)(fa)芯的(de)(de)移(yi)動(dong)，使工作(zuo)泵的(de)(de)來(lai)油(you)進入動(dong)臂(bei)(bei)(bei)(bei)油(you)缸實現動(dong)臂(bei)(bei)(bei)(bei)上(shang)(shang)升(sheng)。比例先(xian)導減(jian)壓閥(fa)(fa)的(de)(de)輸(shu)出壓力越大(da)(da)，控制主(zhu)換向閥(fa)(fa)閥(fa)(fa)芯的(de)(de)位(wei)移(yi)越大(da)(da)，主(zhu)換向閥(fa)(fa)通過的(de)(de)流量越大(da)(da)，動(dong)臂(bei)(bei)(bei)(bei)上(shang)(shang)升(sheng)的(de)(de)速(su)度(du)越快(kuai)。當操作(zuo)手(shou)(shou)柄拉(la)*限(xian)位(wei)置(zhi)(zhi)時(shi)，手(shou)(shou)柄中(zhong)的(de)(de)限(xian)位(wei)電磁鐵通電，手(shou)(shou)柄在(zai)極限(xian)位(wei)置(zhi)(zhi)被(bei)吸合。動(dong)臂(bei)(bei)(bei)(bei)以zui大(da)(da)的(de)(de)速(su)度(du)上(shang)(shang)升(sheng)，當升(sheng)至動(dong)臂(bei)(bei)(bei)(bei)上(shang)(shang)位(wei)限(xian)位(wei)開(kai)關所限(xian)定的(de)(de)位(wei)置(zhi)(zhi)時(shi)，操作(zuo)手(shou)(shou)柄限(xian)位(wei)電磁鐵斷電，手(shou)(shou)柄自動(dong)恢復(fu)到中(zhong)位(wei)，動(dong)臂(bei)(bei)(bei)(bei)就可(ke)保(bao)持在(zai)所限(xian)定的(de)(de)位(wei)置(zhi)(zhi)。在(zai)動(dong)臂(bei)(bei)(bei)(bei)上(shang)(shang)升(sheng)的(de)(de)過程中(zhong)，若需要動(dong)臂(bei)(bei)(bei)(bei)在(zai)某一位(wei)置(zhi)(zhi)停留(liu)，則(ze)需將操作(zuo)手(shou)(shou)柄退回(hui)中(zhong)位(wei)。

DG4V-3-22A-M-U-H7-60

DG4V-3-22AL-M-U-H7-60

DG4V-3-OA-M-U-H7-60

DG4V-3-2B-M-U-H7-60

DG4V-3-2BL-M-U-H7-60

DG4V-3-OB-M-U-H7-60

DG4V-3-2C-M-U-H7-60

DG4V-3-6C-M-U-H7-60

DG4V-3-3C-M-U-H7-60

DG4V-3-31C-M-U-H7-60

DG4V-3-7C-M-U-H7-60

DG4V-3-2N-M-U-H7-60

DG4V-5-2AJ-M-U-H6-20

DG4V-5-2ALJ-M-U-H6-20

DG4V-5-OAJ-M-U-H6-20

DG4V-5-OA-M-U-H6-20

DG4V-5-2BJ-M-U-H6-20

DG4V-5-2BLJ-MU-H6-20

DG4V-5-31BJ-M-U-H6-20

DG4V-5-2NJ-M-U-H6-20

DG4V-5-2CJ-M-U-H6-20

DG4V-5-3CJ-M-U-H6-20

DG4V-5-31CJ-M-U-H6-20

DG4V-5-6CJ-M-U-H6-20

DG5V-7-33C-3-T-M-U-H5-40   

DG5V-7-33C-T-M-U-H5-40  

DG5V-7-52C-2-M-U-H5-40   

DG5V-7-6C-2-M-U-H5-40  

DG5V-7-6C-M-U-C6-30   

DG5V-7-6C-M-U-H5-40    

DG5V-7-6C-T-M-U-B5-40   

DG5V-7-6C-T-M-U-H5-40   

DG5V-7-6C-T-V-M-U-H5-40    

DG5V-7-6C-VM-U-H5-40      

DG5V-7-8C-VM-U-H5-40   

DG5V-H8-2C-M-U-C6-21

DG5V-H8-6C-VM-U-H5-30   

DGMC2-3-AT-AW-BT-AW-41

DGMC2-3-AT-BW-BT-BW-41 

DGMC2-3-AT-CW-BT-BW-41  

DGMC2-3-AT-GW-BT-GW-41 

DGMC2-5-AT-GW-BT-GW-B-30